What is the basic difference between the electronic configurations of transition and inner transition elements ?

Explanation

As we know that transition elements has electronic configuration `(n-1)d^(1-10) ns^(0-2)` and that of inner transition element is `(n - 2)f^(1-14) (n-1)d^(0-1) ns^2`. So, in case of transition elements d - subshell is filled and in case of inner transition element f-subshell is filled.